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Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution
Long, Jinxing; Xu, Ying; Wang, Tiejun; Shu, Riyang; Zhang, Qi; Zhang, Xiaohong; Fu, Juan; Ma, Longlong
2014-11-01
发表期刊BIORESOURCES
卷号9期号:4页码:7162-7175
摘要The structural evolution of Panicum virgatum lignin during hydrothermal depolymerization was investigated. Product distribution from various temperatures was studied using gas chromatography-mass spectrometry (GC-MS) and gel permeation chromatography (GPC) analysis. The physical-chemical properties of initial lignin, tetrahydrofuran soluble fraction, and char were also comparatively characterized by elemental analysis, scanning electron microscopy (SEM), thermogravimetry (TG), and Fourier transform infrared (FT-IR) spectroscopy. Results showed that both the depolymerization and repolymerization were significantly temperature-dependent. The undesired char formation becomes obvious when the temperature is greater than 180 degrees C. Further investigation demonstrated that H lignin is the most accessible for hydrothermal depolymerization, whereas S lignin is the most recalcitrant. Moreover, under the thermal effect and the dissolution of the subcritical water, the basic structure of lignin was first collapsed and then further decomposed into low-molecular weight products by the fracture of ether bonds, accompanied by char formation after repolymerization and dehydration.
文章类型Article
关键词Lignin Depolymerization Repolymerization Structural Evolution
WOS标题词Science & Technology ; Technology
研究领域[WOS]Materials Science
关键词[WOS]IONIC LIQUID PAIRS ; CATALYTIC DEPOLYMERIZATION ; SUGARCANE BAGASSE ; KRAFT LIGNIN ; HOT-WATER ; CONVERSION ; CHEMICALS ; CELLULOSE ; BIOMASS ; DELIGNIFICATION
收录类别SCI
语种英语
WOS类目Materials Science, Paper & Wood
WOS记录号WOS:000345396900110
引用统计
文献类型期刊论文
条目标识符http://ir.giec.ac.cn/handle/344007/10656
专题中国科学院广州能源研究所
作者单位Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Renewable Energy, Guangzhou 510640, Peoples R China
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GB/T 7714
Long, Jinxing,Xu, Ying,Wang, Tiejun,et al. Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution[J]. BIORESOURCES,2014,9(4):7162-7175.
APA Long, Jinxing.,Xu, Ying.,Wang, Tiejun.,Shu, Riyang.,Zhang, Qi.,...&Ma, Longlong.(2014).Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution.BIORESOURCES,9(4),7162-7175.
MLA Long, Jinxing,et al."Hydrothermal Depolymerization of Lignin: Understanding the Structural Evolution".BIORESOURCES 9.4(2014):7162-7175.
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